GB205578A - Improvements in and relating to diaphragms for acoustical instruments - Google Patents

Improvements in and relating to diaphragms for acoustical instruments

Info

Publication number
GB205578A
GB205578A GB2004222A GB2004222A GB205578A GB 205578 A GB205578 A GB 205578A GB 2004222 A GB2004222 A GB 2004222A GB 2004222 A GB2004222 A GB 2004222A GB 205578 A GB205578 A GB 205578A
Authority
GB
United Kingdom
Prior art keywords
plug
diaphragms
gramophone
pleats
diaphragm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2004222A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Parlophone Records Ltd
Original Assignee
Gramophone Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gramophone Co Ltd filed Critical Gramophone Co Ltd
Priority to GB2004222A priority Critical patent/GB205578A/en
Publication of GB205578A publication Critical patent/GB205578A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed

Abstract

205,578. Gramophone Co., Ltd., and Buckle, H. L. T. July 21, 1922. Tool arms, attaching to diaphragms. - The diaphragm of gramophones and other acoustical instruments, of the kind described in Specification 11015/09, in which a pleated strip of material such as paper is folded to form a circular disc with pleats radiating from a central hole, are tensioned by the insertion of a plug .c at the centre b. The inner ends of the pleats abut against and may be glued to the plug, which may be formed by rolling a strip of stiff paper into a tube. When the diaphragm is used in a gramophone, the stylus-bar e, Fig. 3, may be adjustably connected to a disc d of cardboard attached to one end of the plug c. At the other end of the plug, a small ring f may be secured.
GB2004222A 1922-07-21 1922-07-21 Improvements in and relating to diaphragms for acoustical instruments Expired GB205578A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2004222A GB205578A (en) 1922-07-21 1922-07-21 Improvements in and relating to diaphragms for acoustical instruments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2004222A GB205578A (en) 1922-07-21 1922-07-21 Improvements in and relating to diaphragms for acoustical instruments

Publications (1)

Publication Number Publication Date
GB205578A true GB205578A (en) 1923-10-22

Family

ID=10139379

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2004222A Expired GB205578A (en) 1922-07-21 1922-07-21 Improvements in and relating to diaphragms for acoustical instruments

Country Status (1)

Country Link
GB (1) GB205578A (en)

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